Femtosecond spin dynamics of ferromagnetic thin films and nanodots probed by spin polarized photoemission electron microscopy

Heitkamp, Bernd; Kronast, Florian; Heyne, Lutz; Dürr, H. A.; Eberhardt, W.; Landis, S.; Rodmacq, B.

doi:10.1088/0022-3727/41/16/164002

Cited by 10 publications

(10 citation statements)

References 24 publications

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“…2 Both methods are being improved constantly. Nowadays, they provide time resolution in the picosecond range [7][8][9] and a lateral resolution down to a few nanometers. 10,11 It has been shown recently that standing-wave excitation can add dimensionality to PEEM.…”

Section: Introductionmentioning

confidence: 99%

Photoemission electron microscopy of three-dimensional magnetization configurations in core-shell nanostructures

et al. 2011

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We present a photoemission electron microscopy method that combines magnetic imaging of the surface and of the inner magnetization in three-dimensional core-shell nanostructures. The structure investigated consists of a cylindrical nickel core that is completely surrounded by a shell of iron oxide and silicon oxide layers. The method enables one to image the magnetization configuration of the nickel core even though the shell is thicker than the mean-free path of the photoelectrons. Characteristic L 3 and L 2 edges can be observed not only in the yield of the photoelectrons emitted from the surface of the nanostructure but also in its shadow. X-ray magnetic circular dichroism in the electron yield of the x rays absorbed and transmitted by the multilayered nanowire allows for the individual imaging of the magnetization configurations of the iron oxide tube and the nickel core. The method suggests novel approaches for the characterization of the magnetic and material properties of complex three-dimensional nanostructures.

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Section: Introductionmentioning

confidence: 99%

Photoemission electron microscopy of three-dimensional magnetization configurations in core-shell nanostructures

et al. 2011

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“…This allows, for instance, probing the spin polarization near the Fermi level in half‐metallic Heusler alloys 11. The combination with fs laser excitation also enables studies of ultrafast spin dynamics in nanostructures 16…”

Section: Resultsmentioning

confidence: 99%

Spin‐resolved photoemission microscopy and magnetic imaging in applied magnetic fields

Kronast

Schlichting

Radu

et al. 2010

Surface & Interface Analysis

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We describe a novel experimental facility at the BESSY II synchrotron, aiming at probing element-specific magnetic properties at the nm-length scale. It consists of a novel photoemission electron microscope with photoelectron spin analysis combined with a microfocus beamline and full X-ray polarization control. The facility is capable of magnetic imaging in applied fields allowing the observation of magnetic switching phenomena on a 30-nm-length scale.

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“…SR-2PPE with variable time delay between the two pulses has been used with a PEEM [287] to enable magnetic sensitivity with nm spatial and fs temporal resolution. This unique combination proved a powerful but demanding technique for microscopic understanding of the electron and spin dynamics involved in the demagnetization of nanoscale magnetic bits [254,288,289]. The group also explored the dynamics of the transient demagnetization of a 10 nm Co film in an experiment utilizing pulses of 3.1 eV and with a lateral resolution of around 20 nm.…”

Section: Dynamicsmentioning

confidence: 99%

Spin-Resolved Valence Photoemission

Seddon

2014

Handbook of Spintronics

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Spin-resolved valence photoemission has recently seen a resurgence of interest fostered by exciting results in a range of interesting materials. Reviewed here are the basics of, the instrumentation for, and techniques useful in spin-resolved photoemission, together with illustrative examples of its utilization for materials of general importance and of particular relevance to spintronics applications. The example materials are broadly classified into nonmagnetic and magnetic systems. The former covers Rashba systems and topological insulators. The latter includes thin films, half-metals, adsorbates and induced moments, and, finally, a short section on imaging. The review is not intended to be comprehensive in its coverage but rather to provide an introduction to hardware and techniques together with an overview of selected results and state-of-the-art developments. List of Abbreviations 1DOne

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Femtosecond spin dynamics of ferromagnetic thin films and nanodots probed by spin polarized photoemission electron microscopy

Cited by 10 publications

References 24 publications

Photoemission electron microscopy of three-dimensional magnetization configurations in core-shell nanostructures

Photoemission electron microscopy of three-dimensional magnetization configurations in core-shell nanostructures

Spin‐resolved photoemission microscopy and magnetic imaging in applied magnetic fields

Spin-Resolved Valence Photoemission

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